body *,
page view {
  box-sizing: border-box;
  flex-shrink: 0;
  user-select: none;
}

body {
  font-family: Roboto, Helvetica Neue, Helvetica, Tahoma, Arial, PingFang SC-Light, Microsoft YaHei;
  margin: 0;
  overflow: hidden;
}

button {
  margin: 0;
  padding: 0;
  border: 1px solid transparent;
  outline: none;
  background-color: transparent;
}

button:active {
  opacity: 0.6;
}

.flex {
  display: flex;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

.flex-row {
  display: flex;
  flex-direction: row;
}

.justify-start {
  display: flex;
  justify-content: flex-start;
}

.justify-center {
  display: flex;
  justify-content: center;
}

.justify-end {
  display: flex;
  justify-content: flex-end;
}

.justify-evenly {
  display: flex;
  justify-content: space-evenly;
}

.justify-around {
  display: flex;
  justify-content: space-around;
}

.justify-between {
  display: flex;
  justify-content: space-between;
}

.align-start {
  display: flex;
  align-items: flex-start;
}

.align-center {
  display: flex;
  align-items: center;
}

.align-end {
  display: flex;
  align-items: flex-end;
}

.gap-1 {
  gap: 1rem;
}

.gap-2 {
  gap: 2rem;
}
